Mother Vertex in Graph | DFS Trick | GFG | FAANG Interview Problem
Автор: ujjwal painuly edit
Загружено: 2026-01-20
Просмотров: 5
Описание:
In this problem, we need to find a Mother Vertex in a directed graph — a vertex from which all other vertices are reachable.
The optimal approach uses DFS traversal and is based on the idea that the last finished vertex in DFS can be a potential mother vertex, which is then verified by another DFS run.
🧠 Key Concepts Used:
Depth First Search (DFS)
Graph Traversal
Strong graph intuition
Time Complexity: O(V + E)
Space Complexity: O(V)
This is a classic interview problem frequently asked in GFG, FAANG, and system design rounds to test graph fundamentals.
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